Kidd is an intriguingly contradictory antihero: a successful painter who supplements his income through illegal computer activities, a pragmatist who believes in the predictive qualities of the tarot. His latest adventure begins with a pair of enigmatic, seemingly unrelated murders. First, Terence Lighter, a midlevel bureaucrat for the National Security Agency, is shot to death outside his Glen Burnie home. One day later, Jack Morrison, a fellow hacker and former associate of Kidd's, is likewise shot to death, ostensibly while breaking into the data banks of AmMath, a high-tech firm specializing in the development of encryption software. Shortly afterward, Morrison's sister, convinced that her brother was an innocent victim, enlists Kidd's aid in uncovering the circumstances that led to Jack's death.

Kidd, along with some colorful cohorts from his checkered past, soon finds himself imperiled on two related fronts. First, his investigation into AmMath's shadier dealings inadvertently triggers a second series of murders. At the same time, his supposed connection with a mythical hacker/terrorist group named Firewall makes him the target of an intense, highly publicized federal investigation. Kidd's attempts to exonerate Jack Morrison, unearth the details of a treasonous conspiracy, and avoid capture by the combined forces of the FBI and NSA form the substance of this furiously paced, unfailingly entertaining novel.